1 files changed, 1 insertions, 0 deletions
diff --git a/index.xml b/index.xml
index 4f15d5012..38fd4043f 100644
--- a/index.xml
+++ b/index.xml
@@ -199,6 +199,7 @@
 <!ENTITY c6-makedev-exp SYSTEM "chapter6/makedev-exp.xml">
 <!ENTITY c6-ed SYSTEM "chapter6/ed.xml">
 <!ENTITY c6-ed-inst SYSTEM "chapter6/ed-inst.xml">
+<!ENTITY c6-ed-exp SYSTEM "chapter6/ed-exp.xml">
 <!ENTITY c6-patch SYSTEM "chapter6/patch.xml">
 <!ENTITY c6-patch-inst SYSTEM "chapter6/patch-inst.xml">
 <!ENTITY c6-gcc SYSTEM "chapter6/gcc.xml">